Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual estação que estava a 54m acima do nível do mar está agora fechada?
 ###Tabelas: CREATE TABLE batting_averages (batting_averages_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Matches INT, Innings INT, Runs INT, Average VARCHAR, Highest Score VARCHAR, 100s INT, 50s INT) CREATE TABLE superfund_sites (superfund_sites_id AUTO_INCREMENT PRIMARY KEY, CERCLIS ID VARCHAR, Name VARCHAR, County VARCHAR, Proposed VARCHAR, Listed VARCHAR, Construction completed VARCHAR, Partially deleted VARCHAR, Deleted VARCHAR) CREATE TABLE moves_played_compared_with_computer_choices (moves_played_compared_with_computer_choices_id AUTO_INCREMENT PRIMARY KEY, Position INT, best year VARCHAR, best 2-year period VARCHAR, best 3-year period VARCHAR, best 5-year period VARCHAR, best 10-year period VARCHAR, best 15-year period VARCHAR) CREATE TABLE stations (stations_id AUTO_INCREMENT PRIMARY KEY, Station VARCHAR, Distance from Wellington VARCHAR, Height above sea level (m) VARCHAR, Opened INT, Closed VARCHAR) CREATE TABLE academic_performance (academic_performance_id AUTO_INCREMENT PRIMARY KEY, Year INT, Number of Examinees INT, Number of Passed Students INT, Pass Percentage VARCHAR, Obtained GPA-5 INT)  
SELECT Station FROM stations WHERE Height above sea level (m) = 54m AND Closed = closed